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/*
* Copyright 2016, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contributor(s): Blender Institute
*
*/
/** \file eevee_effects.c
* \ingroup draw_engine
*
* Gather all screen space effects technique such as Bloom, Motion Blur, DoF, SSAO, SSR, ...
*/
#include "DRW_render.h"
#include "eevee_private.h"
#include "GPU_texture.h"
#include "GPU_extensions.h"
static struct {
/* Downsample Depth */
struct GPUShader *minz_downlevel_sh;
struct GPUShader *maxz_downlevel_sh;
struct GPUShader *minz_downdepth_sh;
struct GPUShader *maxz_downdepth_sh;
struct GPUShader *minz_downdepth_layer_sh;
struct GPUShader *maxz_downdepth_layer_sh;
struct GPUShader *minz_copydepth_sh;
struct GPUShader *maxz_copydepth_sh;
/* Simple Downsample */
struct GPUShader *downsample_sh;
struct GPUShader *downsample_cube_sh;
/* Theses are just references, not actually allocated */
struct GPUTexture *depth_src;
struct GPUTexture *color_src;
int depth_src_layer;
float cube_texel_size;
} e_data = {NULL}; /* Engine data */
extern char datatoc_effect_minmaxz_frag_glsl[];
extern char datatoc_effect_downsample_frag_glsl[];
extern char datatoc_effect_downsample_cube_frag_glsl[];
extern char datatoc_lightprobe_vert_glsl[];
extern char datatoc_lightprobe_geom_glsl[];
static void eevee_create_shader_downsample(void)
{
e_data.downsample_sh = DRW_shader_create_fullscreen(datatoc_effect_downsample_frag_glsl, NULL);
e_data.downsample_cube_sh = DRW_shader_create(
datatoc_lightprobe_vert_glsl,
datatoc_lightprobe_geom_glsl,
datatoc_effect_downsample_cube_frag_glsl, NULL);
e_data.minz_downlevel_sh = DRW_shader_create_fullscreen(
datatoc_effect_minmaxz_frag_glsl,
"#define MIN_PASS\n");
e_data.maxz_downlevel_sh = DRW_shader_create_fullscreen(
datatoc_effect_minmaxz_frag_glsl,
"#define MAX_PASS\n");
e_data.minz_downdepth_sh = DRW_shader_create_fullscreen(
datatoc_effect_minmaxz_frag_glsl,
"#define MIN_PASS\n");
e_data.maxz_downdepth_sh = DRW_shader_create_fullscreen(
datatoc_effect_minmaxz_frag_glsl,
"#define MAX_PASS\n");
e_data.minz_downdepth_layer_sh = DRW_shader_create_fullscreen(
datatoc_effect_minmaxz_frag_glsl,
"#define MIN_PASS\n"
"#define LAYERED\n");
e_data.maxz_downdepth_layer_sh = DRW_shader_create_fullscreen(
datatoc_effect_minmaxz_frag_glsl,
"#define MAX_PASS\n"
"#define LAYERED\n");
e_data.minz_copydepth_sh = DRW_shader_create_fullscreen(
datatoc_effect_minmaxz_frag_glsl,
"#define MIN_PASS\n"
"#define COPY_DEPTH\n");
e_data.maxz_copydepth_sh = DRW_shader_create_fullscreen(
datatoc_effect_minmaxz_frag_glsl,
"#define MAX_PASS\n"
"#define COPY_DEPTH\n");
}
void EEVEE_effects_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata, Object *camera)
{
EEVEE_CommonUniformBuffer *common_data = &sldata->common_data;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_FramebufferList *fbl = vedata->fbl;
EEVEE_TextureList *txl = vedata->txl;
EEVEE_EffectsInfo *effects;
DefaultTextureList *dtxl = DRW_viewport_texture_list_get();
const DRWContextState *draw_ctx = DRW_context_state_get();
ViewLayer *view_layer = draw_ctx->view_layer;
const float *viewport_size = DRW_viewport_size_get();
/* Shaders */
if (!e_data.downsample_sh) {
eevee_create_shader_downsample();
}
if (!stl->effects) {
stl->effects = MEM_callocN(sizeof(EEVEE_EffectsInfo), "EEVEE_EffectsInfo");
}
effects = stl->effects;
effects->enabled_effects = 0;
effects->enabled_effects |= EEVEE_motion_blur_init(sldata, vedata, camera);
effects->enabled_effects |= EEVEE_bloom_init(sldata, vedata);
effects->enabled_effects |= EEVEE_depth_of_field_init(sldata, vedata, camera);
effects->enabled_effects |= EEVEE_temporal_sampling_init(sldata, vedata);
effects->enabled_effects |= EEVEE_occlusion_init(sldata, vedata);
effects->enabled_effects |= EEVEE_subsurface_init(sldata, vedata);
effects->enabled_effects |= EEVEE_screen_raytrace_init(sldata, vedata);
effects->enabled_effects |= EEVEE_volumes_init(sldata, vedata);
/* Force normal buffer creation. */
if (DRW_state_is_image_render() &&
(view_layer->passflag & SCE_PASS_NORMAL) != 0)
{
effects->enabled_effects |= EFFECT_NORMAL_BUFFER;
}
/**
* Ping Pong buffer
*/
if ((effects->enabled_effects & EFFECT_POST_BUFFER) != 0) {
DRW_texture_ensure_fullscreen_2D(&txl->color_post, DRW_TEX_RGBA_16, DRW_TEX_FILTER | DRW_TEX_MIPMAP);
GPU_framebuffer_ensure_config(&fbl->effect_fb, {
GPU_ATTACHMENT_TEXTURE(dtxl->depth),
GPU_ATTACHMENT_TEXTURE(txl->color_post),
});
GPU_framebuffer_ensure_config(&fbl->effect_color_fb, {
GPU_ATTACHMENT_NONE,
GPU_ATTACHMENT_TEXTURE(txl->color_post),
});
}
else {
/* Cleanup to release memory */
DRW_TEXTURE_FREE_SAFE(txl->color_post);
GPU_FRAMEBUFFER_FREE_SAFE(fbl->effect_fb);
}
/**
* MinMax Pyramid
*/
int size[2] = {(int)viewport_size[0], (int)viewport_size[1]};
size[0] = max_ii(size[0] / 2, 1);
size[1] = max_ii(size[1] / 2, 1);
if (GPU_type_matches(GPU_DEVICE_INTEL, GPU_OS_ANY, GPU_DRIVER_ANY)) {
/* Intel gpu seems to have problem rendering to only depth format */
DRW_texture_ensure_2D(&txl->maxzbuffer, size[0], size[1], DRW_TEX_R_32, DRW_TEX_MIPMAP);
GPU_framebuffer_ensure_config(&fbl->downsample_fb, {
GPU_ATTACHMENT_NONE,
GPU_ATTACHMENT_TEXTURE(txl->maxzbuffer)
});
}
else {
DRW_texture_ensure_2D(&txl->maxzbuffer, size[0], size[1], DRW_TEX_DEPTH_24, DRW_TEX_MIPMAP);
GPU_framebuffer_ensure_config(&fbl->downsample_fb, {
GPU_ATTACHMENT_TEXTURE(txl->maxzbuffer)
});
}
/**
* Compute Mipmap texel alignement.
*/
for (int i = 0; i < 10; ++i) {
float mip_size[2] = {viewport_size[0], viewport_size[1]};
for (int j = 0; j < i; ++j) {
mip_size[0] = floorf(fmaxf(1.0f, mip_size[0] / 2.0f));
mip_size[1] = floorf(fmaxf(1.0f, mip_size[1] / 2.0f));
}
common_data->mip_ratio[i][0] = viewport_size[0] / (mip_size[0] * powf(2.0f, floorf(log2f(floorf(viewport_size[0] / mip_size[0])))));
common_data->mip_ratio[i][1] = viewport_size[1] / (mip_size[1] * powf(2.0f, floorf(log2f(floorf(viewport_size[1] / mip_size[1])))));
}
/**
* Normal buffer for deferred passes.
*/
if ((effects->enabled_effects & EFFECT_NORMAL_BUFFER) != 0) {
int size_fs[2] = {(int)viewport_size[0], (int)viewport_size[1]};
effects->ssr_normal_input = DRW_texture_pool_query_2D(size_fs[0], size_fs[1], DRW_TEX_RG_16,
&draw_engine_eevee_type);
GPU_framebuffer_texture_attach(fbl->main_fb, effects->ssr_normal_input, 1, 0);
}
else {
effects->ssr_normal_input = NULL;
}
/**
* Setup double buffer so we can access last frame as it was before post processes.
*/
if ((effects->enabled_effects & EFFECT_DOUBLE_BUFFER) != 0) {
DRW_texture_ensure_fullscreen_2D(&txl->color_double_buffer, DRW_TEX_RGBA_16, DRW_TEX_FILTER | DRW_TEX_MIPMAP);
GPU_framebuffer_ensure_config(&fbl->double_buffer_fb, {
GPU_ATTACHMENT_TEXTURE(dtxl->depth),
GPU_ATTACHMENT_TEXTURE(txl->color_double_buffer)
});
GPU_framebuffer_ensure_config(&fbl->double_buffer_color_fb, {
GPU_ATTACHMENT_NONE,
GPU_ATTACHMENT_TEXTURE(txl->color_double_buffer)
});
}
else {
/* Cleanup to release memory */
DRW_TEXTURE_FREE_SAFE(txl->color_double_buffer);
GPU_FRAMEBUFFER_FREE_SAFE(fbl->double_buffer_fb);
}
}
void EEVEE_effects_cache_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata)
{
EEVEE_PassList *psl = vedata->psl;
EEVEE_TextureList *txl = vedata->txl;
int downsample_write = DRW_STATE_WRITE_DEPTH;
/* Intel gpu seems to have problem rendering to only depth format.
* Use color texture instead. */
if (GPU_type_matches(GPU_DEVICE_INTEL, GPU_OS_ANY, GPU_DRIVER_ANY)) {
downsample_write = DRW_STATE_WRITE_COLOR;
}
struct Gwn_Batch *quad = DRW_cache_fullscreen_quad_get();
{
psl->color_downsample_ps = DRW_pass_create("Downsample", DRW_STATE_WRITE_COLOR);
DRWShadingGroup *grp = DRW_shgroup_create(e_data.downsample_sh, psl->color_downsample_ps);
DRW_shgroup_uniform_texture_ref(grp, "source", &e_data.color_src);
DRW_shgroup_uniform_float(grp, "fireflyFactor", &sldata->common_data.ssr_firefly_fac, 1);
DRW_shgroup_call_add(grp, quad, NULL);
}
{
static int zero = 0;
static unsigned int six = 6;
psl->color_downsample_cube_ps = DRW_pass_create("Downsample Cube", DRW_STATE_WRITE_COLOR);
DRWShadingGroup *grp = DRW_shgroup_create(e_data.downsample_cube_sh, psl->color_downsample_cube_ps);
DRW_shgroup_uniform_texture_ref(grp, "source", &e_data.color_src);
DRW_shgroup_uniform_float(grp, "texelSize", &e_data.cube_texel_size, 1);
DRW_shgroup_uniform_int(grp, "Layer", &zero, 1);
DRW_shgroup_call_instances_add(grp, quad, NULL, &six);
}
{
/* Perform min/max downsample */
DRWShadingGroup *grp;
psl->maxz_downlevel_ps = DRW_pass_create("HiZ Max Down Level", downsample_write | DRW_STATE_DEPTH_ALWAYS);
grp = DRW_shgroup_create(e_data.maxz_downlevel_sh, psl->maxz_downlevel_ps);
DRW_shgroup_uniform_texture_ref(grp, "depthBuffer", &txl->maxzbuffer);
DRW_shgroup_call_add(grp, quad, NULL);
/* Copy depth buffer to halfres top level of HiZ */
psl->maxz_downdepth_ps = DRW_pass_create("HiZ Max Copy Depth Halfres", downsample_write | DRW_STATE_DEPTH_ALWAYS);
grp = DRW_shgroup_create(e_data.maxz_downdepth_sh, psl->maxz_downdepth_ps);
DRW_shgroup_uniform_texture_ref(grp, "depthBuffer", &e_data.depth_src);
DRW_shgroup_call_add(grp, quad, NULL);
psl->maxz_downdepth_layer_ps = DRW_pass_create("HiZ Max Copy DepthLayer Halfres", downsample_write | DRW_STATE_DEPTH_ALWAYS);
grp = DRW_shgroup_create(e_data.maxz_downdepth_layer_sh, psl->maxz_downdepth_layer_ps);
DRW_shgroup_uniform_texture_ref(grp, "depthBuffer", &e_data.depth_src);
DRW_shgroup_uniform_int(grp, "depthLayer", &e_data.depth_src_layer, 1);
DRW_shgroup_call_add(grp, quad, NULL);
psl->maxz_copydepth_ps = DRW_pass_create("HiZ Max Copy Depth Fullres", downsample_write | DRW_STATE_DEPTH_ALWAYS);
grp = DRW_shgroup_create(e_data.maxz_copydepth_sh, psl->maxz_copydepth_ps);
DRW_shgroup_uniform_texture_ref(grp, "depthBuffer", &e_data.depth_src);
DRW_shgroup_call_add(grp, quad, NULL);
}
}
#if 0 /* Not required for now */
static void min_downsample_cb(void *vedata, int UNUSED(level))
{
EEVEE_PassList *psl = ((EEVEE_Data *)vedata)->psl;
DRW_draw_pass(psl->minz_downlevel_ps);
}
#endif
static void max_downsample_cb(void *vedata, int UNUSED(level))
{
EEVEE_PassList *psl = ((EEVEE_Data *)vedata)->psl;
DRW_draw_pass(psl->maxz_downlevel_ps);
}
static void simple_downsample_cb(void *vedata, int UNUSED(level))
{
EEVEE_PassList *psl = ((EEVEE_Data *)vedata)->psl;
DRW_draw_pass(psl->color_downsample_ps);
}
static void simple_downsample_cube_cb(void *vedata, int level)
{
EEVEE_PassList *psl = ((EEVEE_Data *)vedata)->psl;
e_data.cube_texel_size = (float)(1 << level) / (float)GPU_texture_width(e_data.color_src);
DRW_draw_pass(psl->color_downsample_cube_ps);
}
void EEVEE_create_minmax_buffer(EEVEE_Data *vedata, GPUTexture *depth_src, int layer)
{
EEVEE_PassList *psl = vedata->psl;
EEVEE_FramebufferList *fbl = vedata->fbl;
EEVEE_TextureList *txl = vedata->txl;
e_data.depth_src = depth_src;
e_data.depth_src_layer = layer;
#if 0 /* Not required for now */
DRW_stats_group_start("Min buffer");
/* Copy depth buffer to min texture top level */
GPU_framebuffer_texture_attach(fbl->downsample_fb, stl->g_data->minzbuffer, 0, 0);
GPU_framebuffer_bind(fbl->downsample_fb);
if (layer >= 0) {
DRW_draw_pass(psl->minz_downdepth_layer_ps);
}
else {
DRW_draw_pass(psl->minz_downdepth_ps);
}
GPU_framebuffer_texture_detach(stl->g_data->minzbuffer);
/* Create lower levels */
GPU_framebuffer_recursive_downsample(fbl->downsample_fb, stl->g_data->minzbuffer, 8, &min_downsample_cb, vedata);
DRW_stats_group_end();
#endif
DRW_stats_group_start("Max buffer");
/* Copy depth buffer to max texture top level */
GPU_framebuffer_texture_attach(fbl->downsample_fb, txl->maxzbuffer, 0, 0);
GPU_framebuffer_bind(fbl->downsample_fb);
if (layer >= 0) {
DRW_draw_pass(psl->maxz_downdepth_layer_ps);
}
else {
DRW_draw_pass(psl->maxz_downdepth_ps);
}
/* Create lower levels */
GPU_framebuffer_recursive_downsample(fbl->downsample_fb, 8, &max_downsample_cb, vedata);
DRW_stats_group_end();
/* Restore */
GPU_framebuffer_bind(fbl->main_fb);
}
/**
* Simple downsampling algorithm. Reconstruct mip chain up to mip level.
**/
void EEVEE_downsample_buffer(EEVEE_Data *vedata, GPUTexture *texture_src, int level)
{
EEVEE_FramebufferList *fbl = vedata->fbl;
e_data.color_src = texture_src;
/* Create lower levels */
DRW_stats_group_start("Downsample buffer");
GPU_framebuffer_texture_attach(fbl->downsample_fb, texture_src, 0, 0);
GPU_framebuffer_recursive_downsample(fbl->downsample_fb, level, &simple_downsample_cb, vedata);
DRW_stats_group_end();
}
/**
* Simple downsampling algorithm for cubemap. Reconstruct mip chain up to mip level.
**/
void EEVEE_downsample_cube_buffer(EEVEE_Data *vedata, GPUTexture *texture_src, int level)
{
EEVEE_FramebufferList *fbl = vedata->fbl;
e_data.color_src = texture_src;
/* Create lower levels */
DRW_stats_group_start("Downsample Cube buffer");
GPU_framebuffer_texture_attach(fbl->downsample_fb, texture_src, 0, 0);
GPU_framebuffer_recursive_downsample(fbl->downsample_fb, level, &simple_downsample_cube_cb, vedata);
DRW_stats_group_end();
}
void EEVEE_draw_effects(EEVEE_ViewLayerData *UNUSED(sldata), EEVEE_Data *vedata)
{
EEVEE_TextureList *txl = vedata->txl;
EEVEE_FramebufferList *fbl = vedata->fbl;
EEVEE_StorageList *stl = vedata->stl;
EEVEE_EffectsInfo *effects = stl->effects;
/* only once per frame after the first post process */
effects->swap_double_buffer = ((effects->enabled_effects & EFFECT_DOUBLE_BUFFER) != 0);
/* Init pointers */
effects->source_buffer = txl->color; /* latest updated texture */
effects->target_buffer = fbl->effect_color_fb; /* next target to render to */
/* Temporal Anti-Aliasing MUST come first */
EEVEE_temporal_sampling_draw(vedata);
/* Post process stack (order matters) */
EEVEE_motion_blur_draw(vedata);
EEVEE_depth_of_field_draw(vedata);
EEVEE_bloom_draw(vedata);
/* Save the final texture and framebuffer for final transformation or read. */
effects->final_tx = effects->source_buffer;
effects->final_fb = (effects->target_buffer != fbl->main_fb) ? fbl->main_fb : fbl->effect_fb;
/* If no post processes is enabled, buffers are still not swapped, do it now. */
SWAP_DOUBLE_BUFFERS();
if (!stl->g_data->valid_double_buffer &&
((effects->enabled_effects & EFFECT_DOUBLE_BUFFER) != 0) &&
(DRW_state_is_image_render() == false))
{
/* If history buffer is not valid request another frame.
* This fix black reflections on area resize. */
DRW_viewport_request_redraw();
}
/* Record pers matrix for the next frame. */
DRW_viewport_matrix_get(stl->effects->prev_persmat, DRW_MAT_PERS);
/* Update double buffer status if render mode. */
if (DRW_state_is_image_render()) {
stl->g_data->valid_double_buffer = (txl->color_double_buffer != NULL);
}
}
void EEVEE_effects_free(void)
{
DRW_SHADER_FREE_SAFE(e_data.downsample_sh);
DRW_SHADER_FREE_SAFE(e_data.downsample_cube_sh);
DRW_SHADER_FREE_SAFE(e_data.minz_downlevel_sh);
DRW_SHADER_FREE_SAFE(e_data.maxz_downlevel_sh);
DRW_SHADER_FREE_SAFE(e_data.minz_downdepth_sh);
DRW_SHADER_FREE_SAFE(e_data.maxz_downdepth_sh);
DRW_SHADER_FREE_SAFE(e_data.minz_downdepth_layer_sh);
DRW_SHADER_FREE_SAFE(e_data.maxz_downdepth_layer_sh);
DRW_SHADER_FREE_SAFE(e_data.minz_copydepth_sh);
DRW_SHADER_FREE_SAFE(e_data.maxz_copydepth_sh);
}
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